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llnl

264 indexed repositories · View on GitHub

zfp
Compressed numerical arrays that support high-speed random access

C++ · 887 stars
sundials
Official development repository for SUNDIALS - a SUite of Nonlinear and DIfferential/ALgebraic equation Solvers. Pull requests are welcom...

C · 695 stars
rose
ROSE is an open-source compiler framework engineered by LLNL supporting program analysis and transformation at both the source and binary...

C · 693 stars
RAJA
RAJA Performance Portability Layer (C++)

C++ · 602 stars
OGhidra
OGhidra bridges Large Language Models (LLMs) via Ollama with the Ghidra reverse engineering platform, enabling AI-driven binary analysis ...

Python · 451 stars
Umpire
An application-focused API for memory management on NUMA & GPU architectures

C++ · 422 stars
Caliper
Caliper is an instrumentation and performance profiling library

C++ · 421 stars
blt
A streamlined CMake build system foundation for developing HPC software

C++ · 297 stars
HPC-Tutorials
Future home of hpc-tutorials.llnl.gov

C · 258 stars
LEAP
comprehensive library of 3D transmission Computed Tomography (CT) algorithms with Python and C++ APIs, a PyQt GUI, and fully integrated w...

Cuda · 253 stars
SAMRAI
Structured Adaptive Mesh Refinement Application Infrastructure - a scalable C++ framework for block-structured AMR application development

C++ · 250 stars
conduit
Simplified Data Exchange for HPC Simulations

C++ · 247 stars
smith
Smith is a high order nonlinear thermomechanical simulation code

C++ · 245 stars
libROM
Data-driven model reduction library with an emphasis on large scale parallelism and linear subspace methods

C++ · 238 stars
hiop
HPC solver for nonlinear optimization problems

C++ · 231 stars
magpie
Magpie contains a number of scripts for running Big Data software in HPC environments, including Hadoop and Spark. There is support for L...

Shell · 199 stars
axom
CS infrastructure components for HPC applications

C++ · 197 stars
units
A run-time C++ library for working with units of measurement and conversions between them and with string representations of units and me...

C++ · 173 stars
maestrowf
A tool to easily orchestrate general computational workflows both locally and on supercomputers

Python · 160 stars
merlin
Machine Learning for HPC Workflows

Python · 151 stars
244 more repositories live on View on GitHub

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java under Spindle not searching RPATH for libjli
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Difficulty 4/5 3-5 days Newbie friendliness 48/100

llnl/Spindle#230 · 2 comments · Opened Oct 7, 2026

Maintainers usually reply within 1 day
[BUG] KIN_FP with Anderson acceleration reports success at a non-solution
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Difficulty 2/5 1-3 hours Newbie friendliness 75/100

llnl/sundials#1040 · Opened Oct 7, 2026

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Re-investigate latest nvc++ compiler
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compilation cuda support

Difficulty 4/5 1-2 days Newbie friendliness 58/100

llnl/RAJA#2098 · Opened Oct 6, 2026

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misleading warning regarding UMPIRE_ENABLE_LEGACY_CMAKE_TARGETS
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Difficulty 1/5 Under an hour Newbie friendliness 86/100

llnl/Umpire#1115 · 1 comment · Opened Oct 6, 2026
Different Models by Card Type
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Difficulty 5/5 Over a week Newbie friendliness 35/100

llnl/ai-playground#5 · Opened Oct 6, 2026
Support for Marketplace Card Type
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Difficulty 5/5 Over a week Newbie friendliness 35/100

llnl/ai-playground#4 · Opened Oct 6, 2026
Add Ability to Favorite Cards
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Difficulty 4/5 3-5 days Newbie friendliness 48/100

llnl/ai-playground#3 · Opened Oct 6, 2026
Replace pkgutil usage in script adapters with importlib or other solutions
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Difficulty 3/5 1-2 days Newbie friendliness 58/100

llnl/maestrowf#489 · Opened Oct 6, 2026
Major Changes in SUNDIALS v8.0.0
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Difficulty 5/5 Over a week Newbie friendliness 35/100

llnl/sundials#1038 · Opened Oct 6, 2026

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Move away from flux wrapper on TOSS4Cray
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Difficulty 4/5 3-5 days Newbie friendliness 42/100

llnl/smith#1671 · Opened Oct 6, 2026

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Search for all external packages should begin from the generic find_package({name})
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Difficulty 3/5 1-2 days Newbie friendliness 56/100

llnl/smith#1670 · Opened Oct 5, 2026

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SymbolicValue method resolution is unfaithful
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Difficulty 4/5 3-5 days Newbie friendliness 55/100

llnl/pyctos#2 · Opened Oct 5, 2026
axom fails to find IPC in UMPIRE
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Difficulty 3/5 1-2 days Newbie friendliness 48/100

llnl/axom#2003 · Opened Oct 4, 2026

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Implement multi-stage IMEX time integration for advection-diffusion
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Difficulty 5/5 Over a week Newbie friendliness 25/100

llnl/scaleupROM#63 · Opened Oct 2, 2026
conduit::io::relay::blueprint::load_mesh(path,data,opts) returns nothign when opts is empty
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Difficulty 3/5 1-2 days Newbie friendliness 65/100

llnl/conduit#1717 · Opened Oct 2, 2026

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Lifetime/ownership of spaces for FunctionalWeakForm
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Difficulty 5/5 Over a week Newbie friendliness 25/100

llnl/smith#1668 · Opened Oct 2, 2026

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this can be made generic using `args_PY_MODULE_DIR` instead of `conduit`
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Difficulty 2/5 1-3 hours Newbie friendliness 55/100

llnl/conduit#1714 · Opened Oct 1, 2026

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Gitlab CI restructure
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testing

Difficulty 4/5 3-5 days Newbie friendliness 35/100

llnl/RAJA#2095 · 1 comment · Opened Oct 1, 2026

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Hardware exception in primal::Polyhedron assert on MI250X w/ [email protected]
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bug Hip Testing

Difficulty 4/5 3-5 days Newbie friendliness 42/100

llnl/axom#1998 · 2 comments · Opened Sep 30, 2026

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`ramble workspace setup` fails to concretize any experiment that depends on `blt`
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Difficulty 2/5 1-3 hours Newbie friendliness 86/100

llnl/benchpark#1508 · Opened Sep 30, 2026

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Fails to configure with CMake 4.5
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Difficulty 3/5 1-2 days Newbie friendliness 35/100

llnl/polytope#27 · 3 comments · Opened Sep 30, 2026
Linux AArch64 Tests
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Difficulty 4/5 3-5 days Newbie friendliness 30/100

llnl/proteus#539 · Opened Sep 29, 2026

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Support Cross-Compilation
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Difficulty 5/5 Over a week Newbie friendliness 20/100

llnl/proteus#538 · Opened Sep 29, 2026

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Force O0 through file check or function annotation in O0 Lambda test
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Difficulty 2/5 1-3 hours Newbie friendliness 45/100

llnl/proteus#536 · Opened Sep 28, 2026

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`skill_script_approval_modes` overrides are dropped when the default approval mode is `prompt`
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Difficulty 4/5 3-5 days Newbie friendliness 38/100

llnl/mada#60 · Opened Sep 28, 2026
Add axis/projection flags for professor visualizations
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Difficulty 5/5 Over a week Newbie friendliness 35/100

llnl/professor#19 · Opened Sep 28, 2026
Crash when using MFEMSidreDatacollection
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Reviewed Sidre

Difficulty 3/5 1-2 days Newbie friendliness 52/100

llnl/axom#1993 · Opened Sep 26, 2026

Maintainers usually reply within 2 days
GitLab inventory stops at the first page of projects on python-gitlab >= 4.0.0, and the documented `orgs` key is never read
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Difficulty 3/5 1-2 days Newbie friendliness 72/100

llnl/scraper#89 · Opened Sep 25, 2026
Allow early cleanup of Sycl resources
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Difficulty 3/5 1-2 days Newbie friendliness 68/100

llnl/camp#232 · Opened Sep 25, 2026
E4S test failures on devel
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Difficulty 4/5 3-5 days Newbie friendliness 48/100

llnl/Spindle#215 · Opened Sep 24, 2026

Maintainers usually reply within 1 day
Wrong address for Free Software Foundation
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Difficulty 1/5 Under an hour Newbie friendliness 95/100

llnl/Spindle#214 · Opened Sep 24, 2026

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re-enable py-shroud support
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Difficulty 4/5 3-5 days Newbie friendliness 45/100

llnl/Tribol#251 · Opened Sep 23, 2026

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[umbrella] ReSolve / cuSOLVER-LU backend and the Krylov solver
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Difficulty 4/5 3-5 days Newbie friendliness 40/100

llnl/hiop#813 · 1 comment · Opened Sep 23, 2026

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[umbrella] RAJA sparse triplet matrix: row-start bookkeeping, submatrix copy, reproducibility
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Difficulty 4/5 3-5 days Newbie friendliness 45/100

llnl/hiop#812 · 1 comment · Opened Sep 23, 2026

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[umbrella] Host/device boundary and execution policy in the RAJA backend
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Difficulty 5/5 Over a week Newbie friendliness 25/100

llnl/hiop#811 · Opened Sep 23, 2026

Maintainers usually reply within 1 day
[umbrella] Sparse KKT: solver selection, safe mode, and state across solves
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Difficulty 5/5 Over a week Newbie friendliness 25/100

llnl/hiop#810 · Opened Sep 23, 2026

Maintainers usually reply within 1 day
[umbrella] Feasibility restoration: what it inherits, what it returns, and what bounds it
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Difficulty 5/5 Over a week Newbie friendliness 25/100

llnl/hiop#809 · Opened Sep 23, 2026

Maintainers usually reply within 1 day
Handle duplicate GitHub PR push webhooks
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Difficulty 4/5 3-5 days Newbie friendliness 45/100

llnl/hubcast#446 · Opened Sep 23, 2026

Maintainers usually reply within 1 day
Distinguish GPU builds at ATS level
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Difficulty 3/5 1-2 days Newbie friendliness 55/100

llnl/spheral#532 · Opened Sep 22, 2026

Maintainers usually reply within 2 days
[meta] Coordinating the 2026-09-22 batch of reports (was [H28] atomic device triplet products)
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Difficulty 5/5 Over a week Newbie friendliness 25/100

llnl/hiop#801 · 5 comments · Opened Sep 22, 2026

Maintainers usually reply within 1 day
remove manual openmp compiler flag setting in `smith-config.cmake.in`
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Difficulty 2/5 1-3 hours Newbie friendliness 72/100

llnl/smith#1660 · Opened Sep 21, 2026

Maintainers usually reply within 2 days
Tutorial Design Ideas
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Difficulty 5/5 Over a week Newbie friendliness 25/100

llnl/benchpark-tutorial#64 · Opened Sep 17, 2026
Support for >1 Interpolation Region in MF=6 LAW=1
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Difficulty 4/5 3-5 days Newbie friendliness 52/100

llnl/fudge#30 · Opened Sep 16, 2026
We need a Proteus benchmark suite that automatically and periodically runs
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Difficulty 5/5 Over a week Newbie friendliness 35/100

llnl/proteus#525 · 2 comments · 1 reaction · Opened Sep 15, 2026

Maintainers usually reply within 1 day
[BUG] KLU 64bit integer not recognized
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bug triage

Difficulty 3/5 1-2 days Newbie friendliness 68/100

llnl/sundials#1016 · Opened Sep 14, 2026

Maintainers usually reply within 1 day
Sundials libraries 32int and 64int
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triage

Difficulty 5/5 Over a week Newbie friendliness 45/100

llnl/sundials#1015 · 2 comments · Opened Sep 11, 2026

Maintainers usually reply within 1 day
testing: add coverage of shared array allocations within nested uninlined function calls
May be free again @johnbowen42 claimed this 29 days ago, and no pull request is open. Open
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llnl/proteus#523 · 1 assignee · Opened Sep 11, 2026

Maintainers usually reply within 1 day
Host allocation follow-on work
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App Integration Core maintenance Reviewed

Difficulty 5/5 Over a week Newbie friendliness 35/100

llnl/axom#1982 · Opened Sep 10, 2026

Maintainers usually reply within 2 days
Add concepts for slam's sets, relations and maps
May be free again @kennyweiss claimed this 31 days ago, and no pull request is open. Open
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Reviewed Slam

llnl/axom#1979 · 1 assignee · Opened Sep 8, 2026

Maintainers usually reply within 2 days
Axom Issue Triage
May be free again @cyrush claimed this 36 days ago, and no pull request is open. Open
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help wanted maintenance Reviewed

llnl/axom#1977 · 10 assignees · Opened Sep 3, 2026

Maintainers usually reply within 2 days

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